Plow-break-pin construction.



I. A. WEAVER.

PLOW BREAK PIN CONSTRUCTION.

APPLICATION FILED MAY 5, 1913.

Patented Feb. 10, 1914.

UNITED PATENT OFFICE.

IRA A. WEAVER, OF SPRINGFIELD, ILLINOIS, ASSIGNOR TO THE RACINE-SATTLEYCOMPANY, OF SPRINGFIELD, ILLINOIS, A CORPORATION OF ILLINOIS.

PLOW-BREAK-PIN CONSTRUCTION.

To all whom it may concern:

Be it known that I, IRA A. l/VEAVER, a citizen of the United States, andresident of Springfield, in the county of Sangamon and State ofIllinois, have invented certain new and useful Improvements inPlow-Break- Pin Constructions, of which the following is aspecification.

My invention relates to plows, and has particular reference to a novelbreak-pin for use in connection with gang-plows.

In the employment of gang-plows, par tic-ularly where such plows areconnected to traction-engines, it is desirable that some constructionshould be adopted whereby the plow-point may be freed upon contact witha hidden obstruction such as a rock, during plowing operation. Suchbreak-pin is shown in my prior Patent No. 1,043,27 7 of November 5,1912. However, it has been found in practice that where a metallicbreak-pin is inserted in the standard with the outer ends of the pinlying in contact with a pair of plow-beams, the break-pin will notalways be fractured in such manner as to permit the freeing of thestandard; that is, the pin may first bend, then break with overhangingirregular ends, the pin being left in such condition that it will wedgebetween the two beams and prevent the freeing of the plow-body. Afurther common obj ect-ion is that the pin frequently breaks in thecenter and the ends wedge between the beams.

I have, therefore, devised a break-pin, preferably of cast-metalconstruction, which shall be so constructed that the break will alwaysoccur at the same point and avoid the possibility of wedging of thebroken portions of the pin between the plow-beams. Such construction isshown in the accompanying drawings, wherein,

Figure 1 is a side elevation of a plow having my novel break-pin appliedthereto; Fig. 2 is a plan view thereof; Fig. 3 is a transverse verticalsection of a fragment of the plow-standard, parts being considerablyenlarged, and Fig. 4 is a perspective View of my novel brealepin.

Referring more particularly to the drawings, it will be seen thatbetween plowbeams 10 is mounted a plow-standard 11, the permanentconnection between the parts being through bolt 12 engaging the standardthrough a slotted aperture 13. The

Specification of Letters Patent.

Application filed May 5, 1913.

Patented Feb. 10, 1914.

Serial No. 765,433.

weight of the plow-body and standard is carried by a bolt 14: passingthrough the standard and engaging notches 15 in each of the plow-beams10. My novel break-pin 18 adapted to pass through an aperture in thestandard 11, its ends projecting beneath the plow-beams 10. Thisbreak-pin consists of a substantially circular middle-portion 16provided with reduced flattened ends 17, such ends being apertured as at18 to accommodate fastening-cotters. The material joining the middle andend-portions 16, 17, is considerably reduced in cross-section as at 19to form annular-grooves, whereby the pin is weakened at these points. Bythis means the breakage will invariably occur at such weakened points.

It will be noted that the middle-portion 16 is of considerably lesslength than the width of the plow-standard 11, whereby the break in thepin occurs within the plane of the plow-standard, thus obviating thepossibility of projections outside the plane of the standard which mightwedge between the beams and prevent the freeing of the plowbody. Theflattened portions 17 are provided in order to secure a bearing againstthe lower faces of the beams.

It is obvious that modifications may be made in the construction shownand such modifications are within the scope of my claims I considerwithin the spirit of my invention.

I claim:

1. A break-pin for plows consisting of a body-portion providedintermediate the ends thereof with annular grooves, substantially asdescribed.

2. A break-pin for plows consisting of a body-portion having flattenedends and a substantially circular intermediate portion, said end andintermediate portions being separated by annular grooves, substantiallyas described.

3. A. break-pin for plows consisting of a substantially round barprovided with annular grooves intermediate its ends, the ends of saidbar being provided with transverse apertures for the accommodation offastening-means, substantially as described.

4. In a low, the combination of a pair of beams, a p ow-standard securedthereto, and a break-pin associated with said standard and beams andadapted to normally hold said parts in operative position, said breakpinbeing provided with a pair of weakening-grooves intermediate its ends,whereby the point of breakage of said pin may be controlled,substantially as described.

5. In a plow, the combination of a pair of beams, a plow-standardsecured thereto, and a break-pin associated with said standard and beamsand adapted to normally hold said parts in operative position, saidbreakpin being provided with a pair of weakening-grooves intermediateits ends, the bodyportion between said grooves being of a length lessthan the space between said beams, whereby the point of breakage of saidpin is controlled, substantially as described.

6. In a plow, the combination of a pair of beams, a plow-standardsecured thereto, and a break-pin associated with said standard and beamsand adapt-ed to normally hold said parts in operative position, saidbreak-pin being provided with a pair of weakening-grooves intermediateits ends, said pin being flattened on one side at its ends to providefor a bearing against said beams, substantially as described.

7. In a plow, the combination of plowbeams and a plow-standard, abreak-pin seated on said plow-standard and having portions projectingbeneath said beams, said pin having an intermediate portion andflattened ends, said ends and intermediate portion being separated byannular grooves, said intermediate portion beingof a length less thanthe width of said plow-standard through which said pin projects, substantially as described.

8. A metallic break-pin for plows consist ing of a body portion, saidbody portion being of reduced cross-sectional area at separated pointsin the length thereof whereby breakage of the pin is induced at suchpoints, substantially as described.

IRA A. \VEAVER.

\Vitnesses J OHN F. MCLENNAN, M. J. GORTON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. O.

